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src/gallium/drivers/r300/r300_cb.h

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+/*
+ * Copyright 2008 Corbin Simpson <[email protected]>
+ * Copyright 2010 Marek Olšák <[email protected]>
+ * SPDX-License-Identifier: MIT
+ */
+
+/**
+ * This file contains macros for building command buffers in memory.
+ *
+ * Use NEW_CB for buffers with a varying size and it will also allocate
+ * the buffer.
+ * Use BEGIN_CB for arrays with a static size.
+ *
+ * Example:
+ *
+ *     uint32_t cb[3];
+ *     CB_LOCALS;
+ *
+ *     BEGIN_CB(cb, 3);
+ *     OUT_CB_REG_SEQ(R500_RB3D_CONSTANT_COLOR_AR, 2);
+ *     OUT_CB(blend_color_red_alpha);
+ *     OUT_CB(blend_color_green_blue);
+ *     END_CB;
+ *
+ * And later:
+ *
+ *     CS_LOCALS;
+ *     WRITE_CS_TABLE(cb, 3);
+ *
+ * Or using a little slower variant:
+ *
+ *     CS_LOCALS;
+ *     BEGIN_CS(cb, 3);
+ *     OUT_CS_TABLE(cb, 3);
+ *     END_CS;
+ */
+
+#ifndef R300_CB_H
+#define R300_CB_H
+
+#include "r300_reg.h"
+
+/* Yes, I know macros are ugly. However, they are much prettier than the code
+ * that they neatly hide away, and don't have the cost of function setup, so
+ * we're going to use them. */
+
+/**
+ * Command buffer setup.
+ */
+
+#if MESA_DEBUG
+
+#define CB_LOCALS \
+    int cs_count = 0; \
+    uint32_t *cs_ptr = NULL; \
+    (void) cs_count; (void) cs_ptr
+
+#define BEGIN_CB(ptr, size) do { \
+    assert(sizeof(*(ptr)) == sizeof(uint32_t)); \
+    cs_count = (size); \
+    cs_ptr = (ptr); \
+} while (0)
+
+#define NEW_CB(ptr, size) \
+    do { \
+    assert(sizeof(*(ptr)) == sizeof(uint32_t)); \
+    cs_count = (size); \
+    cs_ptr = (ptr) = malloc((size) * sizeof(uint32_t)); \
+} while (0)
+
+#define END_CB do { \
+    if (cs_count != 0) \
+        debug_printf("r300: Warning: cs_count off by %d at (%s, %s:%i)\n", \
+                     cs_count, __func__, __FILE__, __LINE__); \
+} while (0)
+
+#define CB_USED_DW(x) cs_count -= x
+
+#else
+
+#define CB_LOCALS \
+    uint32_t *cs_ptr = NULL; (void) cs_ptr
+
+#define NEW_CB(ptr, size) \
+    cs_ptr = (ptr) = malloc((size) * sizeof(uint32_t))
+
+#define BEGIN_CB(ptr, size) cs_ptr = (ptr)
+#define END_CB
+#define CB_USED_DW(x)
+
+#endif
+
+
+/**
+ * Storing pure DWORDs.
+ */
+
+#define OUT_CB(value) do { \
+    *cs_ptr = (value); \
+    cs_ptr++; \
+    CB_USED_DW(1); \
+} while (0)
+
+#define OUT_CB_TABLE(values, count) do { \
+    memcpy(cs_ptr, values, count * sizeof(uint32_t)); \
+    cs_ptr += count; \
+    CB_USED_DW(count); \
+} while (0)
+
+#define OUT_CB_32F(value) \
+    OUT_CB(fui(value));
+
+#define OUT_CB_REG(register, value) do { \
+    assert(register); \
+    OUT_CB(CP_PACKET0(register, 0)); \
+    OUT_CB(value); \
+} while (0)
+
+/* Note: This expects count to be the number of registers,
+ * not the actual packet0 count! */
+#define OUT_CB_REG_SEQ(register, count) do { \
+    assert(register); \
+    OUT_CB(CP_PACKET0(register, (count) - 1)); \
+} while (0)
+
+#define OUT_CB_ONE_REG(register, count) do { \
+    assert(register); \
+    OUT_CB(CP_PACKET0(register, (count) - 1) | RADEON_ONE_REG_WR); \
+} while (0)
+
+#define OUT_CB_PKT3(op, count) \
+    OUT_CB(CP_PACKET3(op, count))
+
+#endif /* R300_CB_H */